Burner for acetylene gas.



No. 866,163. PATENTBD SEPT. 17, 1907.

- H. E., SHAFFER.

` BURNER PoR AGBTYLENE GAS.

v AFPLIOATIQN FILED 001.15. 1906.

FIGLI.

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F|G.4. 2 y l Y 3 Il v WITNEssEs: Imag/2R: Y' fm/ 576-P f HENRY E.SHAFFER OF ROCHESTER, NEW YORK.

BURNER FOR .ACETYLENE GAS.

Specification of Letters Patent.

Patentedsept. 17'-, 1907.

Application sied october 15,1906. serial No. 339,113.

To all whom it may concern.:

Be it known that I, HENRY E. SHAFFER, acitizen of the United States, anda resident of Rochester, in the county oi Monroe and State oi New York,have invented certain new and useful Improvements in Burners forAcetylene Gas, of which the following is a specification.

This invention relates to burners for acetylene gas, and consists in theapparatus hereinafter described and claimed.

The object oi the invention is an improved burner in which a` largeramount oi air is led to the gas jet and is better mixed with the issuinggas than in burners heretofore constructed.

In the drawings:-Figure l is a top plan view of a burner embodying thisinvention; Fig. 2 is a vertical section on the line 2-2 of Fig. l; Fig.3 is a like vertical section through a burner of slightly modified form;Fig. 4 is a top plan view of one of the arms of the burner ot Fig. 3.

All oi the devices herein shown are of the twin-burner variety, inwhichtwo jets of mixed acetylene gas and air impinge to iorm a ilatframe. In the manufacture of these burners, a brass tube l, Fig. 3, isemployed, in which a two branch tip is set, each branch adapted toproduce a jet such as above mentioned. In Figs. l and 2 is shown a tipor burner body in which two branches or arms 2 and 3 are set at asuitable angle to each other, such as a right angle. In the uppersuriace oi each branch a channel or slot (4 or 5) is cut transversely,so that the planes oi the two-channels intersect, and the channel isopen at its ends for free induction of air to the point in the channelWhere the gas jet passes through it. The bottom of these channels has anenlargement hereinafter described constituting an air channel. The upperedges of the channel overhang the said enlargement thereof. At themiddle of the bottom of each slot, and in a plane parallel to the sidesthereof, is bored the small gas duct (6 or 7 which communicates with theother gas duct (8 or 9) extending up the branch (2 or 3,) from thechamber l0 in the base of the'tip. The base Il is adapted to rit in thetube 1 above mentioned. The ducts 6 and 7 are bored so that their axesintersect.

As the acetylene gas passes from the chamber l0, and through the ducts 8and 6, or 9 and 7, it issues into the bottom of the slot or air channel4or 5, and, by the force of its ejection, draws in air through the endsofthe channel 4 or 5, so that said air comes from two directions to meetthe jet of acetylene at the point oi its issuance; and on account ofthelarge cross section of the channel 4 or 5, with reference to the area ofthe duct 6 or 7, an ample quantity oi air for the complete combustion ofthe acetylene will be mixed with the acetylene, and this mixing willbegin at the point oi issuance of the acetylene jet, and will continueto mix with said jet and throughout the flame which commences at thepoint where the two jets meet. The air has free access laterally to thejet from its emergence from the duct 6, 7, to the emergence oi the mixedair and gas from the burner. It will be noted that the acetylene duct Gor 7, or 16, in Figs. 2 and 3, is of small diameter relatively to thewidth of the channel through which it emerges, and that said duct entersthe open channel above it at the middle point oi the bottom of saidchannel, and discharges a jet of gas directly toward a point in the opentop of the channel and in a line midway between said opposite sides. Inother words, the jet issuing from the acetylene duct is not directedtowards either side of the channel, but issues freely from the open topof the channel. It is found that this large supply oi air directed tothe jet at the point of issuance and throughout the path of the jet, andthrough a slot of such size that the jet does not light back to themouth oi the duct 6 or 7`, produces an efficient flame of high intensityand without the deposit of carbon upon the burner around the orificefrom which the jet of mixed air and gas issues or at the discharge pointof the small gas duct.

In Fig. 2 is shown an enlargement of the bottom of the channel bycutting a transverse slot l2 or 13, thereby producing an invertedT-shaped slot. ri`his constitutes an enlargement of the bottom of thetransverse air slot, so as to increase the amount o air which is led tothe acetylene jet at or near its point of issuance from the duct 6 or'7. This form gives even a greater supply oi air for the combustion oithe acetylene, and by reason of the slight constriction in the outerportion of the slot, there is a greater mixture of the acetylene and airbefore it emerges from the burner. The oritice where the air andacetylene issue from the burner must, as above stated, be oi such sizeas to prevent a lighting back. l

In Figs. 3 and 4 is shown another iorm of burner embodying the sameinvention, in which the air chamber has an enlargement at the bottom andthe enlargement has sides converging to the position oi the gas jet inci rcular curves. In this case there is a transverse slot l4` or l5 inthe burner, and beneath it from each side of the burner arm is acircular slot shown by the dotted lines in Fig. 4. The two circularslots intersect ina plane which passes through the acetylene duct 1G, asshown in Fig. 4', and in the form shown the slots or enlargements of thechannel have parallel top and bottom surfaces. This produces a greatefliciency, but the exact accuracy of construction just described is notabsolutely essential. In thisform of burner, the outer end of the lowerportion of the air channel is larger than the inner end thereof, so thatthe air that is drawn in by the jet of acetylene gas enters more freelyand is condensed and concentrated on said jet, and thus there is causeda more forcible and more thorough mixing of the acetylene and air closeto the point oi issuance oi' the acetylene, and as the jety passes outthrough the ilo more constricted portion oi the channel 14 or 15. By thecircular converging sides the air is directed later'- ally against allparts oi the sin'face ol tlre issuing jet of acetylene.

The enlargement constituting the bottom or' the channel, as shown inFigs. 2 and 4, causes an overhanging et the edges oi' the channel overthe enlargement. The said enlargement constitutes an air conduit lorleading air to the jet oi acetylene gas and also under and along thesaid overlranging edges ior keeping the latter cool. The saidoverhanging edges are thin, and resh air is constantly moving to allparts O such edges by reason el the suction produced by the acetylenejet, and these overhanging edges are kept cool by the air above,underneath and on the opposite faces ol each, in a manner that isimpossible without such overlranging construction. It is well knownamong those versed in this art that unless the burner is kept cool atthe point where the acetylene jet emerges from it, there will be anaccumulation oi a wax-like black material that will finally clog theorifice and interlere with the production oi the flame; but ii the edgesoi the oril'ice are kept properly cool, this accumulation will not takeplace. This invention is particularly adapted to accomplish this result,and the orm oi device shown in Fi gs. 3 and 4, in which the sides ol theenlargement underneath the said overhanging edges is such as to inducethe maximum induction oi cool air to each point ol the slot or channelthrough which the jet issues; aird in this forni oi the invention,lreslr air' can pass directly to the central portions ol the channelwithout being iirst heated by contact with outer' portions ol the sainechannel, because the sides oi tlre channel converge, and air entering onthese converging lines can pass directly to diflerent portions oi thechannel; and at the same time the lragile overlranging portions oi' theslot are supported at their centers by the intersecting sides oi theenlargement as shown by the dotted lines in Fig. 4.

Inthe forms oi the burner shown no drilling is necessary except lor theacetylene ducts. The air passages and the passages where the mixed airand gas emerges, need not be drilled. 1n each oi these burners the airinlet channel has portions extending laterally rom the portion of thegas jet and in all the forms the outer ends oi the said portions are atleast as large at the open ends as at the acetylene jet. 1n one ol theforms the outer ends oi the channel are larger than at the jet.

The ample air supply to the gas jet and the large space within which theair mixes with the gas, and the lact that the jet is not choked orrestricted in its path7 cause a very complete combustion oi the gas. Thelarge air supply and the mede oi bringing the air' to the gas keeps thisburner cooler than others.

What I claim is 1. ln an acetylene burner, a burner body having two armsfor carising a jet issuing from one arm to impinge upon a jet issuingfrom the other arm; a channel in the ripper' face of each arm having anenlargement constituting the bottom thereof, whereby the ripper' edgesot' the channel overhang the said enlargement, the said channel andenlargement having a bottom and opposite sides and being open at the topand at the ends; and an acetylene duct, o1 a diameter' less than thewidth of the channel, entering the said bottom midway between the sidesand discharging a jet ol gas directly toward a point in the top of thepoint in the top of the channel and in channel and in a line midwaybetween said opposite sides.

2. ln an acetylene bur'ner, a brii'rrer body having two arms for causinga jet issuing from one arm to impinge upon a jet issuing from the otherarm; a transverse channel in the ripper tace ot' each arm and entirelyacross the same, and having an enlargement constituting the bottomthereof, whereby the ripper edges of the channel overhang the saidenlargement, the said channel and enlargement havingl a bottom andopposite sides and being open at the top and also at the ends inopposite sides of the arm; and an acetylene diret, of a diameter lessthan the width of the channel, entering the said bottom midway betweenthe sides and discharging a jet of gas directly toward a a line midwaybetween saidropposite sides.

In an acetylene burner, a brii'ner' body having two arms for causing ajet issuing from one arm to impinge upon a jet issuing from the otherarm; a channel in the ripper' face of each arm having an enlargementconstituting the bottom thereof open at the ends and having sidesconverging inwardly to the position of the acetylene jet, whereby theupper edges of the channel overhang the said enlargement, the saidchannel and enlargement having a bottom and opposite sides and beingoperi at the top and at the ends; and an acetylene duct, et a' diameterless tlrair the width ot' the channel, entering the said bottom midwaybetween, and at the intersection of, the sides arid discharging a jet ofgas directly towai'd a point in the top or the channel and in a lineirridway between said opposite sides.

y-l. ln an acetylene burner, a burner body having two arnrs for causinga jet issuing from one ar'm to impinge upon a jet issuing from the otherarm; a channel in the ripper' face of each arm having an enlargementconstituting the bottom thereof open at the ends and having sidesconverging inwardly in intersecting circular crirves to the position ofthe acetylene jet, whereby the upper' edges of the channel overhang thesaid enlargement, the said channel and enlargement having a bottom andopposite sides and being open at the top and at the ends; and anacetylene drict, of a diameter less than the width of the channel,entering the said bottom midway between, and at the intersection of, thesides and discharging a jet of gas directly toward a point in the' topof the channel and in a line nridway between said opposite sides.

ln an acetylene burner', a burner body having two arms for causing a jetissuing from one arm to mpinge upon a jet issrrirrg from the other' arm;a channel in each arm having an enlargement connected with the bottom otsaid channel and being operi at its ends in opposite sides ot' the armand having sides converging inwardly to the position of the acetylenejet', and an acetylene duct, of a diameter' less than the width of thechannel,l entering the said bottom and discharging a jet ot' gas in aline extending directly from the duct to a point in the top of thechannel.

(3. ln an acetylene brirner, a burner body having two arms for causing ajet issuing from one arm to impinge riporr a jet issuing from the otherarm; a channel in each ar'm having an enlargement connected with thebottom of said channel and being open at its ends in opposite sides ofthe arm and having sides converging inwardly in inter'- secting circularcurves to the position of the acetylene jet; and an acetylene drict, ot'a diameter less than the width of the channel, entering the said bottomand discharging a jet of gas in a line extending directly from the ductto a point in the top ot' the channel.

7. Iii an acetylene burner, a burner body having two ar'nrs for causinga jet issuing from one arm to impinge upon a jet issuing from the other'arm; a channel in the ripper face of each arm having an enlargementconstituting the bottoni ther'eot and having parallel bottom and topsurfaces and being open at the outer ends at the sides of each arm andhaving sides converging inwardly to the position of the acetylene jet;and an acetylene duct, of a diameter' less than the width of thechannel, entering the said bottom at the point of intersection of theconverging sides and midway between the sides and discharging a jet ofgas in a line extending directly from the duct to a point in the top ofthe channel.

8. In an acetylene burner, a burner body having two channel, enteringthe said bottom at the point of inter- 1() arms for causing a jetissuing from one arm to impinge section of the converging sides andmidway between the upon a jet issuing from'the other arni; a channel inthe sides und discharging a jet of gas in a line extending upper face ofeach arm having an enlargement constituting directly from the duct to apoint in the top of the channel. the bottom thereof and having parallelbottom and top sur- 1 faces and being open at the outer ends at thesides of each HENRY E' SHABDER arm and having sides converging inwardlyin intersecting Witnesses: circular curves to the position of theacetylene jet; and l. GUnNEn,

an acetylene duct, of a diameter less than the width of the IIL L.OsGooD.

